Plunger valve for electric meter calibration

Abstract

The invention relates to electric inspection equipment, in particular to a plunger valve for electric meter calibration. The plunger valve comprises a valve bonnet, a valve element and a valve body; the valve bonnet comprises a nut and an internal rotor which is arranged at a gap formed in the bottom of the nut, the outer edge of the internal rotor is matched with an inner thread of the nut, the internal rotor can enter the bottom of the nut by rotating the internal rotor, a valve element sealing gasket is pressed with and coated with the internal rotor, and the nut and the internal rotor can mutually rotate. According to the plunger valve for electric meter calibration, operation is easy and convenient, the design is novel, the sealing effect is good, the service life of sealing rings is prolonged, the maintenance cost is reduced, the precision in the meter calibration process is improved, the opening of the valve element can be visually seen, a connector flange is combined, the site construction difficulty is reduced, the site construction efficiency is improved, the requirement on experience of a meter calibration worker is reduced, the enterprise cost is reduced, and the meter calibration period is shortened.

Description

technical field [0001] The invention relates to electric power detection equipment, in particular to a plunger valve for power meter calibration. Background technique [0002] The valve body in the prior art, especially the plunger valve body of electric power testing equipment, is easy to leak air at the outer sealing cap of the plunger valve adjustment switch for power meter calibration, which affects the accuracy of meter calibration, especially for periodic inspection equipment. , because the sealing rubber is deformed or damaged by the direct extrusion of the nut, it is easy to leak after being tightened again; the rotation opening of the valve core is difficult to control, the thread is small, and the valve body can be closed or opened by rotating multiple turns. In actual use , requires a high level of operator experience. Due to the precision of the calibration instrument, improper operation will affect the accuracy of the operation; the valve body is mostly stainles...

AI Technical Summary

Problems solved by technology

[0002] The valve body in the prior art, especially the plunger valve body of electric power testing equipment, is easy to leak air at the outer sealing cap of the plunger valve adjustment switch for power meter calibration, which affects the accuracy of meter calibration, especially for periodic inspection equipment. , because the sealing rubber is deformed or damaged by the direct extrusion of the nut, it is easy to leak after being tightened again; the rotation opening of the valve core is difficult to control, the thread is small, and the valve body can be closed or opened by rotating multiple turns. In actual use , requires a high level of operator experience. Due to the precision of the calibration instrument, improper operation will affect the accuracy of the operation; the valve body is mostly stainless steel, and the interface needs to be welded many times. The valve core is too small and the sealing is not strong. The strength is uneven and easy to be damaged; the air extraction hole of the connection port is too small and the efficiency is low; in actual use, the equipment needs to be welded on site, which not only increases the difficulty of the on-site construction process, takes a long time, but also increases the labor cost and increases the burden on the enterprise

Images